Furnace



(No Model.)

E.E.STARRQ FURNAGE.

ffy-

3 Sheets-Sheet 1.

Patented Apr. 12, 1898.

IN VE /V T05 (No Model.) v 3 Sheets-Shet 3,- E. E. STARR.

PURNACE.

No. 602,372. PatentedApr. 12,1898.`

/NVENTOH A 770/?NE Y S.

UNITED STATES PATENT Ormes.

EMORYE. STARR, OF BOWLING GREEN, OHIO.

FURNACE.

SPECIFICATIONforInig part of lLetters Patent No. 602,372, dated April12, 1898. i v Application filed June 12,1897.y Serial N0. 640,489. (Nomodel.) Y

To all whom, it may concern.'

Be it known that I, EMORY E. STARR, of Bowling Green, in the county ofWood and State of Ohio, have invented a new and useful Improvement inFurnaces, of which the following is a full, clear, and exactdescription.

The objects of the invention are to provide a furnace especially adaptedfor heating dwellings or similar places, and to so simplify theconstruction of the furnace that it can be made at a minimum of cost andto so construct and assemble the various parts of the furnace that theair intended to be conveyed to the rooms cannot by any possibility bebrought in contact with the products of combustion and whereby theproducts of combus-` tion are utilized to the greatest possible eX- tentand all the heating-surface of the fur-` nace will be brought into moreor less direct contact with the air that is to be supplied toV fsubfiues B and B.

the rooms or apartments.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter yfully set forth, and pointed outin the claims.

Reference is to be had tothe accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective view of the improved furnace. Fig. 2 is a planview of the same. Fig. 3 is a vertical section taken practically on theline 3 3 of Fig.r 4. Fig. 4 is a vertical section taken on the line 4 4of Fig. 3. Fig. 5 is a horizontal section on the line 5 5 of Fig. 4, andFig. 6 isa horizontal section on the line 6 6 of Fig. 4.

The re-pot A of the furnace is providedV with fire-plates 10a, which areremovablyv placed at each side of said fire-pot to extend the lifetimeof the latter, and near the upper portion at one side a throat-ring orbox eX- tension 11 is formed, which carries a fire-door.

12 of any approved construction. At the same side or front of thefire-pot at the bottom a second outwardly-extending throatring or boxextension 13 is provided, the major portion whereof is laid below thegrate 14 of the iire-pot, and the box extension 13 is in directcommunication with the ash-pit and is normally closed atits outer endbya door 15.

side iiues 20 are formed, which extend to the top of the fire-pot andare there closed by horizontal partitions 23. (Illustrated at the leftin Fig. 3.) Each iiue 20 is divided into two sections and formindependent subiiues B and B', the divisionsbeing made through themedium of vertical partitions, (shown in Figs. 3 and 4,) and acorresponding partition 2la is located in the bottom iiue 18, dividingit into two subiues, connecting one with each of the (Shown also inFigs. 3 and 4.) VThe subflues B and B are smoke or combustion iiues, andeach is provided at the top with an outlet 24; but the outlet of theflue B is diagonally opposite the outlet of the iiue B and a singleoutlet only is provided for each complete flue. These outlets 24connectwith pipes or flues 25, located above the `lire-pot, and the saidiues or pipes 25 are brought together centrally over the fire-pot, beingconnected with the upper portion of the latter by a collar or sleeve 27,in which a damper 28 is pivoted, capable of closing the interior of thesleeve or collar and of opening direct communication between thefire-pot and the iiues 25 where they meet.

. The damper 28 is preferably operated aun tomatically, being attachedto a rod 29, which isl carried out to the front of the furnace,terminating in a crank 30, as shown in Fig. 1,

and when the fire-door 12 is closed the crank 4 rests upon the top ofthe door and holds the damp'er 28 in such position as to prevent theproducts of combustion passing up directly from the fire-pot to theflues 25; but the moment that the fire-door is opened the crank 30 orthe damper-handle will gravitate downward and the damper will be opened,establishing a direct communication between the direct draft in theinterior of the fire-pot and the oiftake 32 for the smoke, which pipeconnects Under this arrangement two vertical- IOO with the two upperbranch flues 25 immediately over the point where the damper 28 isplaced, as shown in Fig. 4. The air is conducted to the fire through thepipe 33, which connects with a box 34, the box being located at or nearthe base of the furnace at its front side, and the ash-pit door 15 willopen into the said box. The box 34 is provided with a door 35, and whenthis latter door is opened the ash-pit door may be opened out, so as toremove ashes from the furnace. In order that the ashes may be removedwit-hout dropping into the bottom of the box, a partition 34a isprovided on a level with the bottom of the ash-pit, havingupwardly-flared sides to form a space 34b between said sides and thebox.

The subi'lues B and B' are connected through the divisions of the bottomflue 18. The ilue B is provided with an opening 36 at its top, which isin direct communication with the fire-pot A, as shown in Figs. 3 and 4,and at the opposite side of the fire-pot a similar communication (notshown) is provided between the subflue B' and the fire-pot. The soot orother collected material may be readily cleaned from the bottom of theiiue 18 by means of pipes 38, that extend outwardly from collars 39,which are built in the end portions of the bottom flue 18, as shownparticularly in Figs. 3 and 4, the said pipes being closed by removablecovers 40. The gratebars 14 are separate and independently pivoted, andthe majority of the bars are provided with downwardly-extending arms14a. The arms 14 are loosely entered into the plate 14, secured to theshifting-rod 37, which extends beyond the front of the furnace. Therocking motion that is given to the gratebars under this arrangementimparts a better life to the re than either a shaking or a revolvinggrate.

In operation the fire-door being closed the air will enter the box 34,pass up through the openings 34b and through the ash-pit door when openor through the slides therein into the ash-pit, up through the bed ofcoals into the upper portion of the re-pot, and out from the iirepotthrough the openings 36 at the top. The waste products of combustionthus discharged enter the subfiues B and B', pass through the said fluesdownward to the bottom of the fire-pot proper at one side of thefire-pot, and through the connecting-flues 18 to the opposite side ofthe fire-pot, where the said products of combustion pass out from thellues B and B' through the openings 24, the products of combustion beingconducted to the offtake-pipe 22 by the upper branchpipe iiues 25. When,however, the fire-door is opened to view the lire or to add coalthereto, the damper 28, under the arrangement shown, will be opened andthe gases and other products of combustion will pass directly from there-pot into the offtake-flue, preienting any possibility of any of thegases "'acking out through the open lire-door.

A base 41 is provided for the furnace, which may be and usually is ofsheet-iron, and between the base 41 and the bottom 17 of the outercasing for the fire-pot a horizontal partition 43 is located, having anopening 44 therein preferably at its center. Between the base 41 and thepartition 43 a chamber or a flue C is formed, and between the saidpartition 43 and the bottom 17 of the outer casing of the fire-pot asecond Iiue D is produced, as shown in Figs. 3 and 4. The flue C is ofgreater length than the flue D, and the flue D is in communication withan upright flue D', formed at each side of the outer casing of thefire-pot mainly by placing box-fines E at each side of the furnace, thebox-fines communicating at their lower ends with the horizontal flue C.

The fire-pot and the spaced outer wall 19 thereof, forming its outercasing, are preferably made of cast metal and may be cast in one piece,and are supported upon the base 41 by legs or divided bars 45 and 4G,passed downward through the partition 43. These divided bars or legsform practically the front and rear walls for the ilues C and D. Theilues C, D, D', and E are arranged to conduct the air which is to beheated and supplied to an apartment, while the ilues 18, B, and B', asstated, are intended to receive and conduct off the products ofcombustion.

The box-fines E, adapted to receive the air to be heated, together withthe base 41 and partition 43, the front sheet-iron partition 52 of thefurnace, and the rear sheet-iron partition 53 practically constitute thejacket for the furnace. Both the front and the rear sheet-ironpartitions 52 and 53 extend to the base of the furnace, and the rearouter wall or partition 53 is carried upward to an engagement with theofftake-ue 32 for the smoke, having secured thereto a horizontalair-inlet iiue 47, which is at the rear of the furnace and is providedwith branches 48, extending along the sides of the furnace andcommunicating with the box-fines E. Air is admitted to the back iiue 47through the opening 49 made in its center, while a dome 50 forms theupper portion of the jacket of the furnace, the said dome being providedwith the usual collars 51, with which the heaterpipes are connected. Theair to be heated is drawn in through the opening 40 and conducted by theback flue 47 and branch flues 48 to the side box-fines E. The air thenenters the lower or base ue C, then the next upper flue D, and passes upthrough the vertical connecting-iiues D' to the dome and thence to thesupply-pipes of the house or building. Thus it will be observed that theair to be heated is passed entirely around the cast portion of thefurnace, or that portion which is provided to absorb and radiate theheat, and finds an exit from the furnace in a highly-heated condition.The direction in which the products of combustion travel is indicated byheavily-drawn arrows, while IOO IOS

IIO

lightly-drawn arrows indicate the path of the air to be heated.

In order to prevent the rear wall or partition 53 being affected by theheat, as such partition or wall is quite close to the re-pot, aguard-plate 54 is provided, located between said wall or partition andthe tire-pot, as shown in Fig. et. The cleaning-tubes 38 are passedthrough the boX-fiues E and cross the upright ues D for the heated air.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a furnace, the combination ,with a firepot, andan air-supply for the iire connected with the said fire-pot near thebottom, of a casing surrounding the fire-pot, forming vertical andhorizontal combustion-conducting lines, each vertical flue having directcommunication with the fire-pot near its upper portion, and eachcombustion-Hue being provided with an outlet, exit-lines connected withthe outlets of the combustion-fines, the exit-dues having a branchconnected with the upper portion of the fire-pot, an offtake-lueconnected with the exit-dues, and a damper located in the branch of theexit-lines between the said fines and the iire-pot, substantially asdescribed.

2. In a furnace, the combination,with a lirelright fines being providedwith direct communication at their upper portions with thev nre-pot, andbeing also provided at their tops with outlets, and a partition dividingthe said upright and horizontal ilues into two separate compartments, ofa main outlet for the products of combustion, branch pipes connectedwith the said main outlet and with the outlets of the vertical sectionsof the combustion-nues at the sides of the fire-pot, a connectionbetween the branch pipes and the interior of the tire-pot at the top, adome above the nre-pot, a flue for the air to be heated surrounding thefire-pot and its casing, and a fresh-air inlet connecting with thebottom portion of theair-heating lues, substantially as described. i

3. In a furnace, the combination,with a firepot, an air-supply for thefire-pot, lire-plates removably attached to the fire-pot,combustion-fines at the sides of the lire-pot, being in communicationtherewith, an offtake for the products of combustion, branch pipes fromthe offtake connected with the said combustion-lues, and a branchconnection between the branch pipes and the nre-pot, of a casingsurrounding the lire-pot, provided with outer box air-inlet lines, innerlues located between the boX-lues and the lire-pot, also adapted toconduct air to be heated, bottom air-fines in connection with eachother, one bottom flue being connected with the box-lines and the otherwith the inner air-dues, a dome located over the lire-box, receiving theheated airA

